Apparatus for removing commutators from armature shafts



April 14, 1931. w PABST 1,800,566

APPARATUS FOR REMOVING COMMUTATORS FROM ARMATURE SHAFTS Filed Nov, 29, 1927 3 SheetsFSheeL l A a xi] 14, 1931. w. E. i ABsT APPARATUS FOR REMOVING COMMUTAIORS FROM ARMATURE SHAFTS Filed Nov. 29, 1927 5 Sheets-Sheet 2 mwybmv @QQQQQQ cwmm 1 IN w a.

@atented Apr. 14, 1931 @ATENT QFFEOE W'l'LLIABZ E. PABST, OF ANDERSON, INDIANA, ASSIGNOR TO DELCO-REMY CORPORATION,

OF IDiLY'EOIE, OHIO, A

CORPORATION OF DELAWA IRE APPARATUS FOR REMOVING COMMUTATOR-S FROM ARMATURE SHAFTS Application filed November 29. 1927.

This invention relates to the manufacture of armatures for dynamo electric machines, and particularly to the type of manufacture in which an armature core is first assembled upon ashaft, windings are assembled on the armature core, a previously formed commutator is press-fitted on the shaft, and the leads of the armature conductors are attached to the commutator segments.

One object of the present invention is to provide apparatus for quickly removing the commutator from an assembled armature. The apparatus is particularly useful in case the armature has been found defective because of short circuit and must be disacsembled.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to theaccompanying drawingsfwherein a pre ferred form of embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a side elevation of a commutator removing device embodying the present invention.

Fig. 2 is a sectional view on a larger scale taken principally on the line 22 of Fig. 1.

Fig. 3 isa sectional View on the line 33 of Fig. 2. I

Fig. 4 is a sectional view similar to Fig. 2 showing the position of the apparatus after the commutator has been stripped from the armature shaft.

Fig. 5 is a plan view looking in the direction of the arrow 5 of Figs. 1 and 4.

The apparatus comprises mainly a device for supporting an assembled armature and for providin for its longitudinal movement, means for gripping the commutator and holding it stationary while the assembly of armature shaft, core and winding is being moved en-dwise andmeans engageable with the end of the armature shaft for moving the same relative to the commutator so that the commutator may be stripped from the shaft. In the disclosed form of the present invention the last named means is a plunger operated by an arbor press which comprises a frame 20 providing a base 21 and atubular Serial No. 236,460.

guide 22 which guides a rack 23 cooperating with a gear 24 attached to a shaft 25 operated by a handle 26. The rack 23 carries a plunger 2? for engaging the upper end of an armature shaft 28 upon which are assembled a core 29, windings 30, and a commutator 31. The armature assembly is received by a recess 32 in a block 33 which supports for vertically sliding movement a plate 34 having extensions 35 and 36 received by channels 37 and 38 respectively provided by the block The plate 34 is provided with a notch 39 for receiving the lower end of the armature shaft 28. The plate 3a is supported by springs 40 resting at their lower ends in tubes L1 which are fastened to a plate 42 which, together with a base -13 and blocks 4% and 45 are secured to the block 33 by bolts 46. The upper ends of the springs 1-0 are located by being placed around lugs 47 provided by the plate 34.

The means for gripping the commutator and holding it stationary while the shaft is mover downwardly comprises gripping aws 50 having teeth 51 pointingupwardly and having shanks 52 which are guided for vertical and horizontalmovement by channels 53 provided in the block 33. These channels are coveredby cover-plates 54. The shanks 52 are attached to rods 55 which extend through holes 56 in the plate 34 and which are threaded at their lower ends to receive nuts 57 which support springs 58, located between the nuts 57 and the plate 3%. The gripping jaws 50 are provided with inclined camming surfaces 60 which are engaged by corresponding cumming surfaces 61 of the plates 54.

To use the apparatus the operator will place an armature as embly upon the plate at as shown in Fig. 2. As the plunger 27 of the arbor press is lowered by turning the iandle 26 clockwise as viewed in Fig. l the plate 3- 1 which supports the armature assembly will move downwardly compressing the springs 40 and transmitting downward motion through the springs 58 to the grippin jaws 50. As the grippingjaws 50 move downwardly they will be cammedinwardly toward the commutator 31 due to the cooperation of the surfaces 60 and 61. The tendlCU "-ency ofthe commutatorfil to move down "the position shown in Fig. 4:. During the movement oftheplate 34 into this position its extensions 35 and 36wi1l engage latches '65 and 66, respectively, whichiare slidable through recesses 67 and58 respectively, P1107.

*vided by the plate45. Springs 69 yieldingly'urge these latches inwardly, and inward movement of each of the latches is resisted by stop pin 70 which extendsthrough slot 1 provided by the plate 45. i

' After the plate 34 is movedinto the position shown in Fig. 4 the latches and 66 will retain the plate so that theoperator may withdraw the armatureassembly from which the commutator has stripped. To restore the "apparatus to the position shown in Figs. 1"

and 2 the pins 70 are moved away from the centralpart of the apparatus by operating levers 72 which are pivotally supported by the plate le and are adapted each to engage one ofthe pins 70. When, the levers 72 have been moved sufficiently to retract the latches 65 and 66 fro'm'the plate 3%, the

V springs 40 will be releasedto move the plate 3a to the position shown in Fig. 2, wherel f upon the compression of the springs 58 will be relieved and the grippingjaws'hO maybe separated from the commutator 51.

- The commutator 51 may be used again if A notdefective The'shortcircuited armature Y may be stripped ofjit s windings and the core may be rewoundl While the form'of embodiment Ofthepres- 'en t invention asiherein disclosedmonstitutes a preferred form, it is to beunderst'ood that other formsimight beadopted, all coming within the scope of the claims which follow.

'VVhat is'claimed is as follows i 1. Apparatus for :removinga commutator fromfa'n armature shaftcarr-yin'g'a core and J- gy omnn1tator,comprising in combination, a dev ce :E()I' supporting i-theishaft assembly,

move it endwise, and means for gripping the commutator and preventing it from moving cndwise, as the remainder of the assembly Y a commutator, comprising in combination,

means for engaging the end of the shaft to is moved.

- 2. Apparatusfor removing a commutator from anarma'ture shaft carryinga core and y p U sponse to movement? of the Slltlfl'fEIldWISG for f acommutator, comprising in combination, a

. device "for supporting the shaft assembly,

and means for engaging the end'o'fthe shaft to move. it endwise, and means actuated in responseto movement of the shaft endwise 7 for gripping the commutator and preventing endwise movement thereofas the remainder of the assembly ismoved.

Therefore, the

from an armature shaft carrying a core and a commutator, comprising in combination, a plate for supporting the-shaft assembly for vertical movement, a vertically movable rod for engaging the upper end of the shaft to move it downwardly and means actuated in response togdownward movement oft-he plate .forgripping the commutator and preventing downward movement thereof as the remainder or the assembly is moved downwardly.

4. Apparatus according to claim 3 in which the plate-is supported-onspringswhich tend to restore the plate to uppermost position.

5. Apparatus according to claim 3 in which the plate is supported on springs which tend to restore the plate to uppermost' position,

and in which means are provided for latching the plate in lowermost position to facilitate removal of theshaft and core from the apparatus after the commutator hasbeen re'- moved. i

6. Apparatus according toiclaim 31in which gripping jaws are provided for engaging the commutator, and in which commutator engaging movement of the jaws' is imparted'to them inresponse to downwardmove'ment of the plate; "I

' 7. Apparatus for removing a commutator from an'armature shaft carrying a core and acommutator, comprising in combination, a movable plate for supporting the shaft assembly for vertical movement, a vertically movable rod for engaging the shaft to move it and the plate downwardly, gripping jaws,

means for'guiding said gripping jaws horizontally and vertically, means actuated by the plate for moving said jaws vertically, and cam means for causingsaid jaws to move into engagement with and hold the co1nmutator as the jaws are moved vertically.

8 Apparatus for removing a commutator from an armature shaft carrying a core and a commutator, comprising in combinatiomia 'movable support, resiliently supported, for

supporting the shaft assembly, means for engaging the end of the'shaft to move'it endwise, gripping aws to grip, the commutator, guiding means forsaid jaws',:co'mprising a said commutator;

' 9. Apparatus foriremovin'g a" commutator from an armature shaft carrying a core and means for engaging the end of the shaft to inoveit endwi'se and means actuated in reri in the commutator and oreventin b V i b endwise movement thereofasj the remainder 3:" Apparatus for removing a commutator slot and a cam, and resilientmeans actuated by said plate for causing said-ijawsto engage 

